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Finding the Fourth Proportional to 85,472.80, 128,210.84 and 26,308.41

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Solution

The fourth proportional to 85,472.80, 128,210.84 and 26,308.41 is: 39,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.80 : 128,210.84 = 26,308.41 : x
  2. Step 2: Convert to fraction form
    85,472.80/128,210.84 = 26,308.41/x
  3. Step 3: Cross multiply
    85,472.80x = 128,210.84 × 26,308.41
  4. Step 4: Simplify right side
    85,472.80x = 3,373,022,979.47
  5. Step 5: Solve for x
    x = 3,373,022,979.47/85,472.80
  6. Step 6: Final answer
    x = 39,463.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.